MATLAB: Save uniquely named variables in loop to a certain location

save loop sprint folder location

Hello everyone,
I am running a loop where a variable U is calculated and saved in a .mat file under a unique name every iteration. To name the .mat file I use sprintf:
 for j:length(d)
    % Long calculation of U left out
    save(sprintf('U%02d',j+1), 'U',  '-v7.3');
  end
Each U is now saved in a .mat file named with the iteriation number with two digits after 'U' and in mat version 7.3. This works great.
However, I would also like define the folder location where the .mat file is saved. I know how to do this using the save command without sprintf but I can't seem to get this to work in combination with sprintf.
Any help is greatly appreciated,
Thank you, Roel

Best Answer

Do NOT concatenate paths/directories. The recommended method is to use fullfile:
fullname = fullfile(dir1path,dir2path,...,filename)
This will automatically take into account the required file separators. For your case, something like this:
sdp = some directory path
for k = 1:numel(d)
    % Long calculation of U left out
    fnm = sprintf('U%02d.mat',k+1); 
    save(fullfile(sdp,fnm), 'U', '-v7.3')
end
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